I don't know if this is the best way to do it or not but here goes.I have an access database and a datagridview and they link via a SELECT statement at runtime.I want to total one column named LNLMTS and display the result.I am looking at using SELECT Sum LNLMTS FROM tblProduction WHERE SO=@so AND DATE=@date
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I'm having some trouble firstly trying to calculate the total of a column in the database connected to my vb.net project. Then I want to divide that total by the number of items in a listbox. This is my code so far:
Private Sub btnavresult_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnavresult.Click
Dim sqlx As OleDbCommand = New OleDbCommand
[Code]......
I get an error saying "No value given for one or more required parameters." when I try to run my program on this line "Dim rdr As OleDbDataReader = sqlx.ExecuteReader()"
I am using OleDb, trying to do this:
Dim d as Date = DateSerial(Year(rptDate), Month(rptDate), 1 - 1)
Dim conn as OleDbConnection = new OleDbConnection(connStr)
Dim cm as OleDbCommand = new OleDbCommand()
[code]....
I know that d is the same date as the one in SQL server, specifically 3/31/2011 12:00:00 AM.
With an excel file opened, i'm trying to:
Select a Range of Non-Contiguous Cells within a Column, then return the address of the last active cell.
Below, is what I have so far: Note the section maked:
' I can't get the next bit to work: '
To make it work, so far :(
1. Create a new Project using VS-2010.
2. By default, the form should be displayed as "Form1.vb".
3. Add a Label (No need to name or set anything).
4. Add two buttons (Again, No need to name or set anything).
5. Double click on the Form...
6. With the form code displayed, Select all, then paste the following.
'Option Strict Off
'Option Explicit On
Imports System.IO
[Code].....
I am using visual basic 2008 amd creatomg a datagrodview format like below [code] Now I wnat to get total balance in total column after less discount in percentage with ENTER EVENT proceedure and get the whole total column balance in a textbox i.e Net BalanceTextBox. Please tell me how to calculate discount in percent % and get total in total column and also tell me how to move cursor in next cell instead of bottom row in datagridview.
View 2 RepliesI have 3 columns in a unbound datagridview, "length" "height" and "Total". Total = length x width and the final total in TextBox outside of the Grid. I found question simalar in this forum and tried the code but i am getting errors.The following is the code i am using
Public
Class Form1
Dim UnboundColumn[code]...
I'm working on an access database and there is a problem I can solve in a circumvented way but I was wondering if it can be done by using a function in query.The case: I have a main data table and 2 other tables joined to it.
maintable
country | city...... | postalcode [code].....
From one of the tables I select the respective zone for the postal codes in the main datatable, ie. if the row's postal code column contains 1000 (just an exmple) then the postal code is searched in the "zone" table "from" & "to" columns using "between", and it results in for example "zone1" (zone column). This is a clear thing, it works okay.However I need to select the respective rate column (based on the rows' weight column) from the rates table selecting the appropriate zone.
I can solve this by a switch statment (select country, city.... switch( zone="1", [1], zone="2", [2] etc.) but it gets very tedious when for example I have a rate table with 15 columns, you can imagine that.My question is if I could create a custom function which returned the respective column based on the result of the zone column.is there some way to get the function's return value to be translated in the select statement? for example select country, city....getzone("rates",[zone]) .....
I know that the rates table do not follow the relational database's main principle and it should look like fromkg | tokg | zone | rate and it would work like a charm with "where"but these tables are changed regularly and I receive them in excel...but maybe transforming the tables each time by unions would easily solve my problem doesnt it?I'm still interested if VBA custom function could be used for such a purpose.
I have a Microsoft Access database that I connect to with the Jet Database Engine, using VB.NET. I want to programmatically get all of the column names for a particular table [code]...
Is this possible in Access? If not, what are my options for getting the column names?
I have a program and I get time data from a sqldb and display it in a column in a listbox. What are the proper steps for adding the time as I iterate through the data in the column? I figure I will need to do some conversions on the time to be able to add it and display it as a total.
View 9 RepliesI am using an Access database (mdb file) and for the first time ever I'm connecting to it using a bunch of TableAdapters created in a DataSet.xsd file.I added an Insert query to a TableAdapter, and now I need to retrieve the ID (autonumber) of the last inserted record. Usually, I would send a "SELECT SCOPE_IDENTITY()" query and it would return the ID, but for some reason I cannot get this to work with the TableAdapter.
I tried two methods:1. Add the SELECT SCOPE_IDENTITY() query directly after the INSERT query in the TableAdapter. This method is described in every website I found by googling my problem. Suppose my INSERT query is this:
INSERT INTO Test VALUES("1", "2", "3")
then I should now modify it into
INSERT INTO Test VALUES("1", "2", "3");
SELECT SCOPE_IDENTITY()
I also changed the ExecuteMode to Scalar.
Ok, I run this code, but it doesn't work. It gives me an error saying Characters found after end of SQL statement.Is it because I am using Access and not SQL Server maybe? I dunno... But whatever I try it doesn't work. It's not a spelling error, and I did type the semicolon to separate the two queries so as far as I know it should work.2. Add a separate Select query (selected 'Select query that returns a single value' in the designer) that simply executes this:
SELECT SCOPE_IDENTITY()Then after using the Insert query I can simply call this query method and get the last Id. But unfortunately this doesn't work either. It doesn't even let me add this query in the designer, it says Unable to parse query text.
I've created a basic search form. I have a textbox with a search button and an Access Database as the backend. I have also added it as a new datasource. What I'm looking to do is grab the search string from one textbox and return the data to another textboxt. I have a table called "VehicleInfo" and I want to search the field in my table called "VehicleID" and return the vehicleID I searched for into another textbox. I'm really new to VB. I understand databases and basic code structure, I just don't have a good grasp yet on how these two work together.
Public Class frmMain
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'Garage_ServiceDataSet.Service' table. You can move, or remove it, as needed.
Me.ServiceTableAdapter.Fill(Me.Garage_ServiceDataSet.Service)
[Code] .....
7 textboxes, 7 values, well not always as the textboxe might contain nothing
What im trying to do is add up the textboxes and return the value(total) in the array where am i going wrong??
[code]...
for the first time i am havin this kind of issue, i tried some google'in Private Sub frmMain_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
[Code]...
Trying to select an integer from an Access Database using an SQL statement in VB[code]...
View 5 RepliesI have a VB6 application that is accessing an sql server 2008 database using odbc. The application also accesses an ACCESS database. How can I create a temporary table in my ACCESS database using a table from the SQL database. I have tried the following:
SELECT GLTransaction.* INTO TempAPEntry0 In C:DOCUME~1DONNPS~1.000LOCALS~1TempCSAReport2564.MDB FROM GLTransaction WHERE GLTRSource = 641;
Using 'SELECT from' with value from a text box in vb.net with access database
View 11 Repliesi want to allow user to select or find access database file when the software is executed/opened for the first time. after user selects the file and as he clicks open the software shows the full path of the file and then stores it with the provider and datasource in a txt file for future use.
View 3 RepliesI am using VB 2008 Express to connect to an Access 2007 database. I have a combo box called SelectYearMonth that is populated by the database. When I used the Access report VBA, I used the AfterUpdate() event to calculate a sum. I need to know how to do the same operation in VB 2008 Express using the SelectedIndexChanged event of the combo box.
When I made a report in Access using VBA I coded my calculation as:
Me.ExactReprintTextbox = DSum("Pages", "HBELP_FINAL_Q", "YEARMONTH = " & [SelectYearMonth] & " AND JOBTYPE = 'E'")
While this works great with Access VBA, this syntax does not work in VB 2008 Express. How do I code this in VB 2008 Express?
I need to calculate the sum of all "Pages" of a particular "JOBTYPE" in the Access database for the YEARMONTH selected in the combobox. I have a query in Access called "JobTypeExact_Query" that contains all the pages of that particular JOBTYPE that I need. What I need to do is limit the calculation results to the YEARMONTH selected in the combobox.
My program has an access database with a table called "Contacts". This table stores many values. I have a seperate table that stores surveys. Each contact should have a column for every survey, indicating whether or not the survey has been completed. However, this means I need to add columns to the database while the program is running. I tried the following code, which runs WITHOUT errors, but does not seem to actually add the column.
contactsDataAdapter = New OleDb.OleDbDataAdapter("SELECT * FROM Contacts", frmAdmin.con)
contactsCommandBuilder = New OleDb.OleDbCommandBuilder(contactsDataAdapter)
dtContacts.Clear()
[Code].....
I'm using vb2005express for forms (front-end) and ms access database. I have a form with a master-detail setup. The problem I'm having is that when I set the primary key column to autonumber, I don't get the pk value generated in ms access database into my master datatable in forms when a new record is created. Then I tried setting the AutoIncreament to True in the pk column of the datatable in my dataset (forms). This generates a number in my pk column but its not the number generated in the database (since I think because the pk column is still set to AutoNumber). So I change the field property of my pk to Number in the access database and on my dataset (forms), i still have AutoIncrement to True.
This works okay since what it seems to be doing is getting the max value for the pk column when the datatable is filled upon form load. The problem now is that I normally don't do tableadapter.fill(datatable) at form load since I think there would be a performance issue if record counts around millions. What happens now is that when I create a new record, the pk generated is still 1 which will cause duplicate violation when saving to database. I'm not quite familiar with access features but in oracle, what I do is I create a sequence in database then I create a function that gets the next value of the sequence. Then at form load I set the datatable.column.default_value = get_sequence. How do I do this in ms access?
I am using VB 2008 Express to connect to an Access 2007 database. I have a combo box that is populated by the database. When I used the Access report VBA, I used the AfterUpdate() event to calculate a sum and place the results in a text box. I need to know how to do the same operation in VB 2008 Express using the SelectedIndexChanged event of the combo box.
The combo box is called "cboYearMonth" and is populated by my database, this is working correctly.
The text box that I want the calculated results to appear in is called "ExactPagesTextbox"
I have a query in Access called "JobTypeExact_Query" that contains all the pages that I need. What I need to do is calculate the total number of "Pages" limited to the YEARMONTH selected in the combo box. YEARMONTH is a value in every record in this query.
i have a problem to retreive whole rows of a datagridview and transfer to my new access database in vb environment anyone can give me advice or examples of how to do it ? for example my datagridview colums have JOB_NO, ERR_DESC , REMARK
now i would to post all row (not selected datagridrow) from this datagridview to my new database .. i search at google using row count may do the job but i still fail on ...
I am looking to select all the tables from a microsoft access database. I just need the SQL statement i think, i can connect to the database that is needed.
View 4 RepliesI need to add a new field to an Access database table, the user has filled the table with data, so I have to add the new field but to preserve the old data.
I have found the ALTER TABLE statement, but it gives me an error (ALTER TABLE is not a valid statement)
I done this in php+mysql with "ALTER TABLE People ADD Address TEXT NULL AFTER Name" (as an example)
How can do this in VB2010?
I am using a query in vb.net, database is Access. I need alias of query like sql but the query return me column alias and also ' '
SELECT COLUMN1 AS 'FIRST NAME'
I expect the result to be a field called FIRST NAME but it returns the string "FIRST NAME". Is there is any way if return me the field FIRST NAME instead of "FIRST NAME".
How can I get information what data type a certain column is. (Integer, string, memo,...)
View 1 RepliesI have an access database with several tables. in one of the tables there are three columns named quantity, price and total cost.total cost is an expression of (quantity * price). the expression looks grate in the datagrid etc but when I need to save it to the database
View 1 RepliesI have an access database that has columns where the data is a tickbox, i would like to select all the ticks from one row. Erm i'll try and be more descriptive: The database has the family of aircraft in the first column and then each subsequent column is to do with a calculation and i want to assign boolean variables the value of true if the tick box is checked and false if it isnt. How can i assign the values of the tick box to a variable?
I have this query:
CODE:
Where accessConn is the connection to the database and cmbFamily.Text is the row in the column family that i want to select all the KG_IFP values from.If you're not living on the edge, you're taking up too much room
I use this code to populate info from Access DB to txtBox[code]...
View 1 Repliesthis code links to the access database but but I just get only the first row in each combobox...
and I want also cboBox3 depend from cboBox2 depends from cboBox1, how can I do it?
Imports System.Data
Imports System.Data.OleDb
Public Class frm
Dim objConnection As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source = DBSOURCEDB.mdb;Jet OLEDB:Database Password=pass;")
[Code]...
